Jakku (rutu?) Can Star Wars follow Dune's lead to legitimize the sequel trilogy?

If you have read the first Dune trilogy and seen the Star Wars sequel trilogy, you may have determined that the desert planet of Jakku was likely named after Arrakis' deep-desert community of Seitch Jacurutu. If that was the writers' intent, I don't consider that as a rip-off but as a tribute. And it would not be the first time Star Wars has paid homage to Dune.

Along those lines. In book 3- 'Children of Dune' Ghanima Atreides (Paul's daughter) undergoes a self-induced mind-wipe and convinces herself that her twin brother, Leto II was eaten by a sandworm. In reality, Leto II was going alone on a secret mission into the deep desert. It was essential that Ghanima believed her brother to be dead. If she had any knowledge of the truth, no matter how well hidden, a Bene Gesserit truth-sayer would pull it out of her. Leto II's adversaries would then have gone looking for him, thus compromising his mission and endangering his life.

How can this idea relate to Star Wars?

Luke was pretty pathetic in The Last Jedi, but what if that was by his own design? What if he had previously undergone a self-imposed mind-wipe, similar to Ghanima's? Maybe Ben Solo didn't destroy all of Luke's new academy? What if some students escaped? What if Luke determined the best way to keep them safe is to forget about them by using a 'force-forget' technique on himself? So, while Rey begins her own Jedi academy on Tatooine, what if there's another, secret one elsewhere in the galaxy as an insurance policy against any Jedi purges that the future may have in store?

So in short. What if Luke was pathetic in TLJ by design, because that was the only guaranteed way to keep his surviving students safe?

I know Favreau and Filoni want to save Luke's character and validate the sequel trilogy. The Mandalorian has given us some very interesting connective tissue between RotJ and TFA. We're starting to see why and how the New Republic failed, and why and how the First order could rise from the Imperial remnant. Hopefully they can find a good way to validate Luke's character as well, and taking another page out of the Dune books would be a fine way to do just that.